Why adhesion testing matters
Even a flawless finish can fail if it doesn’t bond well to the substrate. Weak adhesion leads to peeling, flaking, blistering, and ultimately corrosion and rework. With tighter customer audits and accelerated timelines, data-driven adhesion validation is essential for OEMs, Tier suppliers, and MSMEs alike.
What is a coating peel off test?
A peel (pull-off) test evaluates how firmly a coating adheres to metal, plastic, glass, or composite. A calibrated instrument applies tensile force perpendicular to the surface until the film detaches. We record the maximum value (MPa or N/mm²) and classify the failure mode—adhesive at the interface, cohesive within the film, or mixed. These insights guide improvements in surface prep, primers, film build, and cure.
Industries we support
- Automotive & transportation
- Industrial equipment & powder coating shops
- Construction & architectural profiles
- Appliances & consumer products
- Aerospace & defense components
- General metal finishing
Why choose Kiyo R&D Lab
- Advanced infrastructure: Portable and bench-top adhesion testers, surface metrology, and imaging.
- Standards-aligned: Methods aligned with ASTM D4541 ISO 4624 IS 101 (Part 5/Sec 1).
- Experienced team: Materials and surface-science specialists who translate numbers into actions.
- Clear reporting: Pass/fail calls, photographs, and practical recommendations.
- Quick turnaround: Efficient workflows for pilot builds, PPAP, and audits.
How our peel off test works
- Sample preparation: We verify substrate, coating stack-up, film thickness, and cure. Conditioning is applied when specified.
- Dolly attachment: High-strength adhesive bonds a loading dolly to the coating; alignment ensures pure tensile loading.
- Curing of adhesive: Controlled dwell ensures consistent bond before test.
- Pull-off: The instrument applies increasing perpendicular force until detachment occurs.
- Inspection & classification: We photograph the test spot and classify failure mode.
- Reporting: You receive peak value, failure type, images, observations, and next-step advice.
Common causes of poor adhesion
- Inadequate surface preparation (oil, oxides, dust)
- Primer or topcoat compatibility issues
- Incorrect cure (time/temperature/UV/moisture)
- Excessive or uneven film thickness
- Contamination from handling or environment
Benefits of testing in India
Choosing coating peel off test services in India – Kiyo R&D Lab saves time and cost while keeping communication simple. You get local expertise with international-grade methods, faster logistics, and documentation that’s ready for supplier qualification and audits.
How to prepare your job for success
| Item | Details required |
|---|---|
| Coating system | Primer/base/topcoat types, supplier, mix ratio |
| Substrate & prep | Material, thickness, surface treatment or conversion coat |
| Film thickness | Target & measured (µm) |
| Cure schedule | Time/temperature or UV/moisture cure details |
| Acceptance criteria | Minimum pull-off value and allowed failure modes |
| Test standard | ASTM/ISO/IS reference or your internal spec |
Where this test adds value
- Supplier qualification: Verify coating lines and incoming parts.
- R&D and reformulation: Compare primers, resins, and cure profiles.
- Process control: Spot-check batches to prevent drift and field failures.
- Failure analysis: Determine whether issues stem from prep, chemistry, or application.
Service highlights
- Standards-aligned methods (ASTM/ISO/IS)
- High-resolution images in reports
- Failure-mode classification
- Root-cause guidance & next steps
- Fast scheduling & delivery
Complementary tests
- Coating thickness, gloss, hardness
- Cross-hatch or tape adhesion
- Impact & flexibility (mandrel bend)
- Salt spray & corrosion screening
